Freehyphen;Ion and Crystalline Spectra of Pr3+(Pr IV)

摘要

The spectrum of the free tripositive praseodymium ion (Pr IV) has been obtained under high resolution between 1200 Aring; and the infrared. The analysis has yielded all 49 levels of the four lowest configurations 4f2, 4f5d,4f6s,4f6p.A comparison with the crystal levels of Pr3+in various lattices shows a depression of up to 5 in the anhydrous chlorides.